Add dbregs_dr[0123]_trap_variable in arch/amd64/t_ptrace_wait*
Add new preliminary tests for testing that CPU Debug Registers can be used
to trap on a variable (write operation).
dbregs_dr0_trap_variable:
Verify that setting trap with DR0 triggers SIGTRAP
dbregs_dr1_trap_variable:
Verify that setting trap with DR1 triggers SIGTRAP
dbregs_dr2_trap_variable:
Verify that setting trap with DR2 triggers SIGTRAP
dbregs_dr3_trap_variable:
Verify that setting trap with DR3 triggers SIGTRAP
Sponsored by <The NetBSD Foundation>
This commit is contained in:
kamil
parent
840d624913
commit
1a4e4ead74
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@ -1,4 +1,4 @@
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/* $NetBSD: t_ptrace_wait.c,v 1.3 2016/12/03 01:41:15 kamil Exp $ */
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/* $NetBSD: t_ptrace_wait.c,v 1.4 2016/12/04 03:38:58 kamil Exp $ */
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/*-
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* Copyright (c) 2016 The NetBSD Foundation, Inc.
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@ -27,7 +27,7 @@
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: t_ptrace_wait.c,v 1.3 2016/12/03 01:41:15 kamil Exp $");
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__RCSID("$NetBSD: t_ptrace_wait.c,v 1.4 2016/12/04 03:38:58 kamil Exp $");
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#include <sys/param.h>
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#include <sys/types.h>
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@ -53,6 +53,38 @@ __RCSID("$NetBSD: t_ptrace_wait.c,v 1.3 2016/12/03 01:41:15 kamil Exp $");
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#include "../../t_ptrace_wait.h"
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union u {
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long raw;
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struct {
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long local_dr0_breakpoint : 1; /* 0 */
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long global_dr0_breakpoint : 1; /* 1 */
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long local_dr1_breakpoint : 1; /* 2 */
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long global_dr1_breakpoint : 1; /* 3 */
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long local_dr2_breakpoint : 1; /* 4 */
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long global_dr2_breakpoint : 1; /* 5 */
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long local_dr3_breakpoint : 1; /* 6 */
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long global_dr3_breakpoint : 1; /* 7 */
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long local_exact_breakpt : 1; /* 8 */
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long global_exact_breakpt : 1; /* 9 */
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long reserved_10 : 1; /* 10 */
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long rest_trans_memory : 1; /* 11 */
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long reserved_12 : 1; /* 12 */
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long general_detect_enable : 1; /* 13 */
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long reserved_14 : 1; /* 14 */
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long reserved_15 : 1; /* 15 */
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long condition_dr0 : 2; /* 16-17 */
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long len_dr0 : 2; /* 18-19 */
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long condition_dr1 : 2; /* 20-21 */
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long len_dr1 : 2; /* 22-23 */
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long condition_dr2 : 2; /* 24-25 */
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long len_dr2 : 2; /* 26-27 */
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long condition_dr3 : 2; /* 28-29 */
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long len_dr3 : 2; /* 30-31 */
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} bits;
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};
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#if defined(HAVE_DBREGS)
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ATF_TC(dbregs_print);
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ATF_TC_HEAD(dbregs_print, tc)
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@ -89,7 +121,7 @@ ATF_TC_BODY(dbregs_print, tc)
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printf("Before calling %s() for the child\n", TWAIT_FNAME);
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TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
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validate_status_stopped(status, sigval);
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validate_status_stopped(status, sigval);
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printf("Call GETDBREGS for the child process\n");
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ATF_REQUIRE(ptrace(PT_GETDBREGS, child, &r, 0) != -1);
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@ -1192,6 +1224,450 @@ ATF_TC_BODY(dbregs_preserve_dr3_continued, tc)
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}
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#endif
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#if defined(HAVE_DBREGS)
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ATF_TC(dbregs_dr0_trap_variable);
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ATF_TC_HEAD(dbregs_dr0_trap_variable, tc)
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{
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atf_tc_set_md_var(tc, "descr",
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"Verify that setting trap with DR0 triggers SIGTRAP");
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}
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ATF_TC_BODY(dbregs_dr0_trap_variable, tc)
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{
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const int exitval = 5;
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const int sigval = SIGSTOP;
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pid_t child, wpid;
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#if defined(TWAIT_HAVE_STATUS)
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int status;
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#endif
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struct dbreg r1;
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struct dbreg r2;
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/* Number of available CPU Debug Registers on AMD64 */
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const size_t len = 16;
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size_t i;
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volatile int watchme;
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union u dr7;
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dr7.raw = 0;
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dr7.bits.global_dr0_breakpoint = 1;
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dr7.bits.condition_dr0 = 3; /* 0b11 -- break on data write&read */
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dr7.bits.len_dr0 = 3; /* 0b11 -- 4 bytes */
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printf("Assert that known number of Debug Registers (%zu) is valid\n",
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len);
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ATF_REQUIRE_EQ(__arraycount(r1.dbregs), len);
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ATF_REQUIRE_EQ(__arraycount(r2.dbregs), len);
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printf("Before forking process PID=%d\n", getpid());
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child = atf_utils_fork();
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if (child == 0) {
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printf("Before calling PT_TRACE_ME from child %d\n", getpid());
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FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
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printf("Before raising %s from child\n", strsignal(sigval));
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FORKEE_ASSERT(raise(sigval) == 0);
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watchme = 1;
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printf("Before raising %s from child\n", strsignal(sigval));
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FORKEE_ASSERT(raise(sigval) == 0);
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printf("Before exiting of the child process\n");
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_exit(exitval);
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}
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printf("Parent process PID=%d, child's PID=%d\n", getpid(), child);
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printf("Before calling %s() for the child\n", TWAIT_FNAME);
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TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
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validate_status_stopped(status, sigval);
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printf("Call GETDBREGS for the child process (r1)\n");
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ATF_REQUIRE(ptrace(PT_GETDBREGS, child, &r1, 0) != -1);
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printf("State of the debug registers (r1):\n");
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for (i = 0; i < __arraycount(r1.dbregs); i++)
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printf("r1[%zu]=%#lx\n", i, r1.dbregs[i]);
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r1.dbregs[0] = (long)(intptr_t)&watchme;
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printf("Set DR0 (r1.dbregs[0]) to new value %#lx\n", r1.dbregs[0]);
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r1.dbregs[7] = dr7.raw;
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printf("Set DR7 (r1.dbregs[7]) to new value %#lx\n", r1.dbregs[7]);
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printf("New state of the debug registers (r1):\n");
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for (i = 0; i < __arraycount(r1.dbregs); i++)
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printf("r1[%zu]=%#lx\n", i, r1.dbregs[i]);
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printf("Call SETDBREGS for the child process (r1)\n");
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ATF_REQUIRE(ptrace(PT_SETDBREGS, child, &r1, 0) != -1);
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printf("Call CONTINUE for the child process\n");
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ATF_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
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printf("Before calling %s() for the child\n", TWAIT_FNAME);
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TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
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validate_status_stopped(status, SIGTRAP);
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printf("Before calling %s() for the child\n", TWAIT_FNAME);
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TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
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validate_status_stopped(status, sigval);
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printf("Call GETDBREGS for the child process (r2)\n");
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ATF_REQUIRE(ptrace(PT_GETDBREGS, child, &r2, 0) != -1);
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printf("Assert that (r1) and (r2) are the same\n");
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ATF_REQUIRE(memcmp(&r1, &r2, len) == 0);
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printf("Before resuming the child process where it left off and "
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"without signal to be sent\n");
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ATF_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
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printf("Before calling %s() for the child\n", TWAIT_FNAME);
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TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
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validate_status_exited(status, exitval);
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printf("Before calling %s() for the child\n", TWAIT_FNAME);
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TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
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}
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#endif
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#if defined(HAVE_DBREGS)
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ATF_TC(dbregs_dr1_trap_variable);
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ATF_TC_HEAD(dbregs_dr1_trap_variable, tc)
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{
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atf_tc_set_md_var(tc, "descr",
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"Verify that setting trap with DR1 triggers SIGTRAP");
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}
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ATF_TC_BODY(dbregs_dr1_trap_variable, tc)
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{
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const int exitval = 5;
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const int sigval = SIGSTOP;
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pid_t child, wpid;
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#if defined(TWAIT_HAVE_STATUS)
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int status;
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#endif
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struct dbreg r1;
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struct dbreg r2;
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/* Number of available CPU Debug Registers on AMD64 */
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const size_t len = 16;
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size_t i;
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volatile int watchme;
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union u dr7;
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dr7.raw = 0;
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dr7.bits.global_dr1_breakpoint = 1;
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dr7.bits.condition_dr1 = 3; /* 0b11 -- break on data write&read */
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dr7.bits.len_dr1 = 3; /* 0b11 -- 4 bytes */
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printf("Assert that known number of Debug Registers (%zu) is valid\n",
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len);
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ATF_REQUIRE_EQ(__arraycount(r1.dbregs), len);
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ATF_REQUIRE_EQ(__arraycount(r2.dbregs), len);
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printf("Before forking process PID=%d\n", getpid());
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child = atf_utils_fork();
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if (child == 0) {
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printf("Before calling PT_TRACE_ME from child %d\n", getpid());
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FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
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printf("Before raising %s from child\n", strsignal(sigval));
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FORKEE_ASSERT(raise(sigval) == 0);
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watchme = 1;
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printf("Before raising %s from child\n", strsignal(sigval));
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FORKEE_ASSERT(raise(sigval) == 0);
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printf("Before exiting of the child process\n");
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_exit(exitval);
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}
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printf("Parent process PID=%d, child's PID=%d\n", getpid(), child);
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printf("Before calling %s() for the child\n", TWAIT_FNAME);
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TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
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validate_status_stopped(status, sigval);
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printf("Call GETDBREGS for the child process (r1)\n");
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ATF_REQUIRE(ptrace(PT_GETDBREGS, child, &r1, 0) != -1);
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printf("State of the debug registers (r1):\n");
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for (i = 0; i < __arraycount(r1.dbregs); i++)
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printf("r1[%zu]=%#lx\n", i, r1.dbregs[i]);
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r1.dbregs[1] = (long)(intptr_t)&watchme;
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printf("Set DR1 (r1.dbregs[1]) to new value %#lx\n", r1.dbregs[1]);
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r1.dbregs[7] = dr7.raw;
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printf("Set DR7 (r1.dbregs[7]) to new value %#lx\n", r1.dbregs[7]);
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printf("New state of the debug registers (r1):\n");
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for (i = 0; i < __arraycount(r1.dbregs); i++)
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printf("r1[%zu]=%#lx\n", i, r1.dbregs[i]);
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printf("Call SETDBREGS for the child process (r1)\n");
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ATF_REQUIRE(ptrace(PT_SETDBREGS, child, &r1, 0) != -1);
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printf("Call CONTINUE for the child process\n");
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ATF_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
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printf("Before calling %s() for the child\n", TWAIT_FNAME);
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TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
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validate_status_stopped(status, SIGTRAP);
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printf("Before calling %s() for the child\n", TWAIT_FNAME);
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TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
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validate_status_stopped(status, sigval);
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printf("Call GETDBREGS for the child process (r2)\n");
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ATF_REQUIRE(ptrace(PT_GETDBREGS, child, &r2, 0) != -1);
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printf("Assert that (r1) and (r2) are the same\n");
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ATF_REQUIRE(memcmp(&r1, &r2, len) == 0);
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printf("Before resuming the child process where it left off and "
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"without signal to be sent\n");
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ATF_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
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printf("Before calling %s() for the child\n", TWAIT_FNAME);
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TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
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validate_status_exited(status, exitval);
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printf("Before calling %s() for the child\n", TWAIT_FNAME);
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TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
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}
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#endif
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#if defined(HAVE_DBREGS)
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ATF_TC(dbregs_dr2_trap_variable);
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ATF_TC_HEAD(dbregs_dr2_trap_variable, tc)
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{
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atf_tc_set_md_var(tc, "descr",
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"Verify that setting trap with DR2 triggers SIGTRAP");
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}
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ATF_TC_BODY(dbregs_dr2_trap_variable, tc)
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{
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const int exitval = 5;
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const int sigval = SIGSTOP;
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pid_t child, wpid;
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#if defined(TWAIT_HAVE_STATUS)
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int status;
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#endif
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struct dbreg r1;
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struct dbreg r2;
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/* Number of available CPU Debug Registers on AMD64 */
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const size_t len = 16;
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size_t i;
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volatile int watchme;
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union u dr7;
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dr7.raw = 0;
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dr7.bits.global_dr2_breakpoint = 1;
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dr7.bits.condition_dr2 = 3; /* 0b11 -- break on data write&read */
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dr7.bits.len_dr2 = 3; /* 0b11 -- 4 bytes */
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printf("Assert that known number of Debug Registers (%zu) is valid\n",
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len);
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ATF_REQUIRE_EQ(__arraycount(r1.dbregs), len);
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ATF_REQUIRE_EQ(__arraycount(r2.dbregs), len);
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printf("Before forking process PID=%d\n", getpid());
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child = atf_utils_fork();
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if (child == 0) {
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printf("Before calling PT_TRACE_ME from child %d\n", getpid());
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FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
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printf("Before raising %s from child\n", strsignal(sigval));
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FORKEE_ASSERT(raise(sigval) == 0);
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watchme = 1;
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printf("Before raising %s from child\n", strsignal(sigval));
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FORKEE_ASSERT(raise(sigval) == 0);
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printf("Before exiting of the child process\n");
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_exit(exitval);
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}
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printf("Parent process PID=%d, child's PID=%d\n", getpid(), child);
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printf("Before calling %s() for the child\n", TWAIT_FNAME);
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TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
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validate_status_stopped(status, sigval);
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printf("Call GETDBREGS for the child process (r1)\n");
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ATF_REQUIRE(ptrace(PT_GETDBREGS, child, &r1, 0) != -1);
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printf("State of the debug registers (r1):\n");
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for (i = 0; i < __arraycount(r1.dbregs); i++)
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printf("r1[%zu]=%#lx\n", i, r1.dbregs[i]);
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r1.dbregs[2] = (long)(intptr_t)&watchme;
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printf("Set DR2 (r1.dbregs[2]) to new value %#lx\n", r1.dbregs[2]);
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r1.dbregs[7] = dr7.raw;
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printf("Set DR7 (r1.dbregs[7]) to new value %#lx\n", r1.dbregs[7]);
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printf("New state of the debug registers (r1):\n");
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for (i = 0; i < __arraycount(r1.dbregs); i++)
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printf("r1[%zu]=%#lx\n", i, r1.dbregs[i]);
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printf("Call SETDBREGS for the child process (r1)\n");
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ATF_REQUIRE(ptrace(PT_SETDBREGS, child, &r1, 0) != -1);
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printf("Call CONTINUE for the child process\n");
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ATF_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
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printf("Before calling %s() for the child\n", TWAIT_FNAME);
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TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
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validate_status_stopped(status, SIGTRAP);
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printf("Before calling %s() for the child\n", TWAIT_FNAME);
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TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
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validate_status_stopped(status, sigval);
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printf("Call GETDBREGS for the child process (r2)\n");
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ATF_REQUIRE(ptrace(PT_GETDBREGS, child, &r2, 0) != -1);
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printf("Assert that (r1) and (r2) are the same\n");
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ATF_REQUIRE(memcmp(&r1, &r2, len) == 0);
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printf("Before resuming the child process where it left off and "
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"without signal to be sent\n");
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ATF_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
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printf("Before calling %s() for the child\n", TWAIT_FNAME);
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TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
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validate_status_exited(status, exitval);
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printf("Before calling %s() for the child\n", TWAIT_FNAME);
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TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(HAVE_DBREGS)
|
||||
ATF_TC(dbregs_dr3_trap_variable);
|
||||
ATF_TC_HEAD(dbregs_dr3_trap_variable, tc)
|
||||
{
|
||||
atf_tc_set_md_var(tc, "descr",
|
||||
"Verify that setting trap with DR3 triggers SIGTRAP");
|
||||
}
|
||||
|
||||
ATF_TC_BODY(dbregs_dr3_trap_variable, tc)
|
||||
{
|
||||
const int exitval = 5;
|
||||
const int sigval = SIGSTOP;
|
||||
pid_t child, wpid;
|
||||
#if defined(TWAIT_HAVE_STATUS)
|
||||
int status;
|
||||
#endif
|
||||
struct dbreg r1;
|
||||
struct dbreg r2;
|
||||
/* Number of available CPU Debug Registers on AMD64 */
|
||||
const size_t len = 16;
|
||||
size_t i;
|
||||
volatile int watchme;
|
||||
union u dr7;
|
||||
|
||||
dr7.raw = 0;
|
||||
dr7.bits.global_dr3_breakpoint = 1;
|
||||
dr7.bits.condition_dr3 = 3; /* 0b11 -- break on data write&read */
|
||||
dr7.bits.len_dr3 = 3; /* 0b11 -- 4 bytes */
|
||||
|
||||
printf("Assert that known number of Debug Registers (%zu) is valid\n",
|
||||
len);
|
||||
ATF_REQUIRE_EQ(__arraycount(r1.dbregs), len);
|
||||
ATF_REQUIRE_EQ(__arraycount(r2.dbregs), len);
|
||||
|
||||
printf("Before forking process PID=%d\n", getpid());
|
||||
child = atf_utils_fork();
|
||||
if (child == 0) {
|
||||
printf("Before calling PT_TRACE_ME from child %d\n", getpid());
|
||||
FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
|
||||
|
||||
printf("Before raising %s from child\n", strsignal(sigval));
|
||||
FORKEE_ASSERT(raise(sigval) == 0);
|
||||
|
||||
watchme = 1;
|
||||
|
||||
printf("Before raising %s from child\n", strsignal(sigval));
|
||||
FORKEE_ASSERT(raise(sigval) == 0);
|
||||
|
||||
printf("Before exiting of the child process\n");
|
||||
_exit(exitval);
|
||||
}
|
||||
printf("Parent process PID=%d, child's PID=%d\n", getpid(), child);
|
||||
|
||||
printf("Before calling %s() for the child\n", TWAIT_FNAME);
|
||||
TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
|
||||
|
||||
validate_status_stopped(status, sigval);
|
||||
|
||||
printf("Call GETDBREGS for the child process (r1)\n");
|
||||
ATF_REQUIRE(ptrace(PT_GETDBREGS, child, &r1, 0) != -1);
|
||||
|
||||
printf("State of the debug registers (r1):\n");
|
||||
for (i = 0; i < __arraycount(r1.dbregs); i++)
|
||||
printf("r1[%zu]=%#lx\n", i, r1.dbregs[i]);
|
||||
|
||||
r1.dbregs[3] = (long)(intptr_t)&watchme;
|
||||
printf("Set DR3 (r1.dbregs[3]) to new value %#lx\n", r1.dbregs[3]);
|
||||
|
||||
r1.dbregs[7] = dr7.raw;
|
||||
printf("Set DR7 (r1.dbregs[7]) to new value %#lx\n", r1.dbregs[7]);
|
||||
|
||||
printf("New state of the debug registers (r1):\n");
|
||||
for (i = 0; i < __arraycount(r1.dbregs); i++)
|
||||
printf("r1[%zu]=%#lx\n", i, r1.dbregs[i]);
|
||||
|
||||
printf("Call SETDBREGS for the child process (r1)\n");
|
||||
ATF_REQUIRE(ptrace(PT_SETDBREGS, child, &r1, 0) != -1);
|
||||
|
||||
printf("Call CONTINUE for the child process\n");
|
||||
ATF_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
|
||||
|
||||
printf("Before calling %s() for the child\n", TWAIT_FNAME);
|
||||
TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
|
||||
|
||||
validate_status_stopped(status, SIGTRAP);
|
||||
|
||||
printf("Before calling %s() for the child\n", TWAIT_FNAME);
|
||||
TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
|
||||
|
||||
validate_status_stopped(status, sigval);
|
||||
|
||||
printf("Call GETDBREGS for the child process (r2)\n");
|
||||
ATF_REQUIRE(ptrace(PT_GETDBREGS, child, &r2, 0) != -1);
|
||||
|
||||
printf("Assert that (r1) and (r2) are the same\n");
|
||||
ATF_REQUIRE(memcmp(&r1, &r2, len) == 0);
|
||||
|
||||
printf("Before resuming the child process where it left off and "
|
||||
"without signal to be sent\n");
|
||||
ATF_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
|
||||
|
||||
printf("Before calling %s() for the child\n", TWAIT_FNAME);
|
||||
TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
|
||||
|
||||
validate_status_exited(status, exitval);
|
||||
|
||||
printf("Before calling %s() for the child\n", TWAIT_FNAME);
|
||||
TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
|
||||
}
|
||||
#endif
|
||||
|
||||
ATF_TP_ADD_TCS(tp)
|
||||
{
|
||||
setvbuf(stdout, NULL, _IONBF, 0);
|
||||
|
|
@ -1214,5 +1690,10 @@ ATF_TP_ADD_TCS(tp)
|
|||
ATF_TP_ADD_TC_HAVE_DBREGS(tp, dbregs_preserve_dr2_continued);
|
||||
ATF_TP_ADD_TC_HAVE_DBREGS(tp, dbregs_preserve_dr3_continued);
|
||||
|
||||
ATF_TP_ADD_TC_HAVE_DBREGS(tp, dbregs_dr0_trap_variable);
|
||||
ATF_TP_ADD_TC_HAVE_DBREGS(tp, dbregs_dr1_trap_variable);
|
||||
ATF_TP_ADD_TC_HAVE_DBREGS(tp, dbregs_dr2_trap_variable);
|
||||
ATF_TP_ADD_TC_HAVE_DBREGS(tp, dbregs_dr3_trap_variable);
|
||||
|
||||
return atf_no_error();
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue